HSC Science (General) इयत्ता १२ वी - Maharashtra State Board Question Bank Solutions for Biology

Explain the properties of a good or ideal cloning vector for rDNA technology.

A PCR machine can raise the temperature up to 100°C but after that, it is not able to lower the temperature below 70°C automatically. Which step of PCR will be hampered first in this faulty machine? Explain why?

Give the steps in PCR or polymerase chain reaction with suitable diagrams.

Enlist different types of restriction enzymes commonly used in rDNA technology? Write about their role.

Enlist and write in brief about the different biological tools required in rDNA technology.

Which factor of an ecosystem includes plants, animals, and micro-organisms?

How is the dormancy of seeds different from hibernation in animals?

If a marine fish is placed in a freshwater aquarium, will it be able to survive? Give reason.

Distinguish between the following:

Hibernation and Aestivation

Distinguish between the following:

Ectotherms and Endotherms

Observe the graph and select the correct option:

Short answer type question

Tropical regions exhibit species richness as compared to polar regions. Justify.

Planaria shows ______ type of nervous system.

The technique which involves addition or deletion of genes is ______.

ECoRI is obtained from ______.

The enzyme restriction endonuclease ______.

Ti plasmid being used for introducing genes in plants obtained from ______.

Polymerase chain reaction is most useful in ______.

What is plasmid?

What is Palindromic sequence?